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(No Model.) 5 Sheets-Sheet 1. B. J. GOYLE. SYSTEM 0F EXGAVATING AND REFILLING.

/N VE N TOH Patented Apr. 17

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(No Model.) 5 Sheets-Sheet 2.

" B. J. COYLE.

SYSTEM 0F EXGAVATING AND REPILLING.

No. 518,394.- Patented Apr. 17

(No Model.) 5 Sheets-Sheet 3.

B. J. GOYLE.

SYSTEM OP EXCAVATING AND REFILLING. No..518,394. Patented Apr. 17, 1894.

I /N VE N TOR gygy@ TOR/VE Y.

W/ TNE SSE S.

(lNo Model.)

5 Sheets-Sheet 5. B. J. COYLE. SYSTEM 0F BXGAVATING AND REPILLING. No. 518,394. 1 Patented Apr. 17. 1894.

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lIUNITRIY),- STATES PATENT oFF-1e' BERNARD J. coYLE, or wAsr-nneron, DISTRICT orooLUMBIA.

SYSTEM QF ExcAvATlvNc AN n REFILLiNc.

SPEGIFICATION formingpart of Letters Patent No.518,394, dated April 1'?, 1894. Application led May 28, 189.3l Serial No. 434,777.` (No modehl do declare the followin g to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had-to the accompanying drawings, aud to the letters and iigures of reference marked 'hereom which form a part o f this specificaion.

'Ifhis invention relates to improvements in laying sewers and other underground conduits, and it has for its 'object to provide a system whereby the earth may be excavated to form a trench in which a sewer may be built or a conduit laid, and the earth necesary to ll over the -arch conveyed directly through the trench, without carrying or elevating it tothe surface.

The invention is designed to be employed in cities and other places, and to furnish la means whereby the work of excavating and refilling can be carried 'ondirectly within the trench, so that the surface at each side of the trench may be absolutely unobstructed,either by the earth thrown up Vfrom the trench, or by the necessary conveyances for transporting the earth from the excavated portions to those to be filled in.

The invention consists, essentially, in a system of excavating and refilling, continuously, as the work progresses, by the construction of ways within the trench and below the'surface,-connecting the entire line of work, on which the material may be transported. from. said point o f excavation to the point of deposit as more fully hereinafter set forth. The

above mentioned objects are obtained by the v means illustrated in the accompanying drawings, in which- -Figures 1 and la represent a longitudinal sectional view of a portion of'a street or road bed, showing my invention, and the method of operating thesame, and Figs. 2 and 2*,rep

resent a plan or top view of oneI of the series 5o of ways, and'Fig. 8 represents a perspective View of asuspended tray and itshangers employed in my improved system. Fig. 4 represents a cross-section of a trench/showing a` series of stringers and-braces supporting th sides.

' In carrying out my invention, the excavation is commenced and a section of the being removed,cross beams'l and 2 andstringi ers 3"are placed at the proper elevation horizontally, obviating the use of vertical boards for supporting the sides. The cross beams-2 serve to support the ways, upon which the earth is conveyed from the excavation to the place of deposit over the sewer Aor conduitsection where the filling is required. The ways consist of a series of planks resting on the cross beams 2. These lmay be variously arranged as circumstances require, without departing from the spirit of my invention.

In the drawings (Fig. 2), the letter'cindicates the main track of the ways. The said planks are arranged longitudinally in the trench`;

, near the frontend of the excavation or trench the ways are connected by flooring over the open space between the sides; or planks maybe located at each side of the trench and the space between them iioored over to make a crossing for the conveyance's. This enlarges the area of the'ways, so as to give room for the conveyances during the operation of loading, and enables the workmen handling the material to convey the same to the place of deposit. The boards a in the present instance are extended on each side beyond the crossing` so Aas to leave a central space between them through which the earth may be thrown to the ways by workmen below.

' The numeral 3 indicates ya. tray, one or more of which may be employed and. suspended near the forward end of the partlyexcavated trench in any convenient;v manner, being shown in the present instance as-suspended by means of hangers 4, to the cross beams 1. These trays afford means for, initially, re;

moving a quantity or bulk of surplus earth roo corresponding to the ultimate displacement caused .by the sewer. The said tray is formed of loose planks laid in the hangers, the sides being held upright by the hangers and the ends held in place by said sides. In deep excavations, additional beams '5, similar to the beams 1 and 2 are extended fromside to side of the trench, and stringers 3 are interposed at their ends, and upon the beams is laid a tray or series f trays 6, to permit the necessary gangs of shovelers to work, in excavatng and elevating the earth to the ways.

In many cases as before stated, the planks may be diierently arranged from the method just above described; for instance; the forward planks of the ways may be so placed as to have their ends resting directly upon the front portion of the trenchand extended forward upon the surface of thesame. The ways at the rear' end may also be' elevated atany angle to permit the earth to be deposited extended. acrossthe trench, at thesurface,

and upon these are located platforms on which concrete ,may be mixed, the platforms being .made .to .occupy a position directly over the trench. "This is only possible in connection with my improved system, as all other systems operate above thesurface and prevent any such .arrangement of the platforms.- At or near the platforms may be placed a vertical conveyor 8, `having its upper end funnel shaped, so that the concrete used in building the sewer may be conveniently lowered to'the desired level in the trench. lCross beams 49 arealsolaid across the trench, at the surface, to serve Aas supports` yfor a platform on which bricks or building material may be piled and lowered as-indicated in Fig. 1 of the draw- 19,85-

The Aoperation of my. system, in detail, step by step, is as follows: The ground is rst broken fora proper distance and the surplus .Barth-conveyed directly away. The excavation is continued until a quantity or bulk of earth is removed equal tothe ultimate displacement of the sewer, or conduit. The beams 1 and 2 are then set,.and the ways are laid upon the said beams 2. The conveyances are thenarranged upon the )Nays at each side of the.trench, andthe earth is loaded into them directly, as itis excavated. After the excavation. has reached a proper depth the beams 5 are laid, the tray 6 put in place as shown in Fig. 1. 'Ihe excavated material is carried .to a point over t-he completed sewer and dumped, as shown in Fig. 1, the deposited earth being compacted tampers as in- 1t will be seen-from the above description that the gist and essential feature of my invention consists in a system, whereby the entire work of excavating and rellingis carriedon wholly within the trench, or the area thereof, thus leaving the surface completely free from obstructions of any kind.` It is evident also that by my system the whole operation of excavating4 and refilling maybe carried on noiselessly, thus obviating the disadvantages ofmachinery operated: by steam, i

whichl is a` source of danger, especially in places where traffic is carried on. Moreover, the active operations of excavating, building and refilling, being-carried on underground, protect thefworkmen from the effectsof. severe weather hot -or cold, `and enables them to work with .ease and comfort.

Another4 advantage is that the work 4ofexcavating and refilling, after beingstarted is continuous, and the expense of interruptions is4 avoided, and the work more rapidly accomplished. H

Besides the advantages, already enumerated, the .system is4 much more simple, convenient and economical than any .system heretofore in use. l

. Havingv thus described the nature and operation of my invention and disclosed ther advantages thereof, what I claim, and desire to secure by Letters Patent, is-.

1. The method of excavating, constructing and refilling I in trenches, .which -con`sists in excavatinga desired length to thebottom in advance; constructing the sewer or other structure, and conveying the material thereafter excavated upon ways within the excavation, and below the ground. surface tothe rear, and refilling with `it upon the constructed work, as set forth.

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'2. In a system of underground excavating .and refilling the combinationwith the beams located across the. trench at itssurface, of the dependent tray suspended therefrom, within the trench, substantially asspeciled.

3. In a system of excavating and refilling in trenches, the combination with the elevated timbers, rmly secured 4against the sides or suspended from above, of the Way or tracksupported thereon, substantially as specified.

4. A system'of bracing open trenches,con sisting of a series of horizontal .stringere or timbers placed along the same, with cross beams firmly driven and secured to them, thus supporting the sides without vertical planks or sheathing boards, as set forth.

5. The combination .with the cross beams -and horizontal strin ers which brace the sides of the trench, o the ways and the tray located below the same, whereby the earth from the lower portion of the trench may be elevated and conveyed to the point of deposit, substantially as specified.

Ill

6. In a, system of excavating and refilling, In testimony whereof I aix my signature in the 'combination with tlf lbeams. arrange presence of two witnesses. l across the trench in whic t el operations o f excavating and refilling are being conducted, A BERNARD J' COX LE' of the platform whereon the concrete is pre- Witnesses: pared, and the chute whereby it is delivered J. V. 'CARRAHEm to the trench below, substantially as speci fied. LAWRENCE MILSTEAD. 

